Karthik Kambatla created MAPREDUCE-4565:
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Summary: Backport MR-2855 to branch-1: ResourceBundle lookup
during counter name resolution takes a lot of time
Key: MAPREDUCE-4565
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4565
Project: Hadoop Map/Reduce
Issue Type: Bug
Affects Versions: 0.23.0
Reporter: Karthik Kambatla
Assignee: Siddharth Seth
Fix For: 0.23.2
Loading a job status page in trunk takes a lot of time, and it seems like most
of the time is spent resolving counter names. Looking through the JDK source,
ResourceBundle.getBundle(String) ends up calling getClassContext() which is not
very efficient. I think if we pass our own classloader manually it will be
faster. In Counters.incrAllCounters, we may also be able to avoid setting the
counter name if one is already set.
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